The working language is English, in the application and in messages - 2022. Acquired for the sake of communication with a smartphone - informing about calls and viewing messages. Fitness properties were not of interest, but they are there and seem to work. The native application (HAYLOU) loses connection a couple of times a day. You need to install the Hello HAYLOU application from the market on top of that application (it has higher ratings) and do not be too lazy to read and understand the installation instructions - the result has been more than 3 days without a single loss of connection, after off / on the smartphone connects itself. Didn't get wet in the water. I haven't tested the accuracy of the pedometer. Apparently, the Ls05 model is the same only in a round case and is more expensive
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